1. Ara, P., Menal, P.: On regular rings with involution. Arch. Math. 42, 126–130 (1984)
2. Chang, C.C., Keisler, H.J.: Model Theory, 3rd edn. North Holland, Amsterdam (1990)
3. Goodearl, K.R.: Von Neumann Regular Rings. Krieger, Malabar (1991)
4. Herrmannn, C., Niemann, N.: On linear representations of
$$\ast $$
*
-regular rings having representable ortholattice of projections (2018).
arXiv:1811.01392
5. Herrmann, C., Roddy, M.S.: On varieties of modular ortholattices that are generated by their finite dimensional members. Algebra Universalis 72, 349–357 (2014)